沈阳城乡建设用地扩张时空特征分析

摘要

探讨城乡建设用地变化时空规律是优化城乡建设用地管理重要依据.基于1986、2000和2015年3期TM/OLI遥感影像,采用GIS方法分析沈阳市城乡建设用地变化时空特征.结果表明,①1986～2000年,城乡建设用地增加169.78 km2,其中城市、乡村建设用地分别占28％、72％;2000～2015年,城乡建设用地增加151.63 km2,其中城市、乡村建设用地分别占71％、29％,阶段差异性显著;②于洪区、苏家屯区、浑南区和沈北新区分别在1986～2000年和2000～2015年城乡建设用地扩展中具有异速性和区域差异性;③自城市中心向外围,城乡用地扩张强度指数先增后降,在12 km呈峰值.%To investigate the space-time regularities of the variation of the urban and rural construction land is the important basis of optimization of the urban and rural construction land management.In this paper,based on the 1986,2000,2015,3 TM/OLI remote sensing image,using GIS analysis method analyzed the change pattern of space and time in shenyang urban and rural construction land,etc.The results showed that:① From 1986 to 2000,urban and rural construction land increase 169.78 km2,including urban and rural construction land accounted for 28％ and 72％,respectively;From 2000 to 2015,urban and rural construction land increase 151.63 km2,including urban and rural construction land accounted for 71％ and 29％,respectively,showing a significant phase difference;② Yuhong district,Sujiatun district,Hunnan district,and Shenbei New Area in 1986-2000 and 2000-2015 in the urban and rural construction land expansion with different speed and regional differences.③ From the city center to the periphery,urban and rural land expansion intensity index lower after increase first,about 12 km from peak.